#VU104989 Out-of-bounds read in Linux kernel - CVE-2025-21724

Vulnerability identifier: #VU104989

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21724

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the iova_bitmap_offset_to_index() function in drivers/vfio/iova_bitmap.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.128, 6.6 - 6.6.75, 6.12 - 6.12.12, 6.13 - 6.13.1

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External links
https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9
https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3
https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6
https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe
https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.76

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?